From: Liang Yan <lyan@suse.com>
Date: Fri, 22 Sep 2017 18:55:33 -0400
Message-Id: <20170922225533.1928-1-lyan@suse.com>
Subject: [Qemu-devel] [PATCH] chardev/baum: fix baum that releases brlapi
 twice
To: samuel.thibault@ens-lyon.org, pbonzini@redhat.com, marcandre.lureau@redhat.com
Cc: qemu-devel@nongnu.org, qemu-trivial@nongnu.org

Error process of baum_chr_open needs to set brlapi null, so it won't
get released twice in char_braille_finalize, which will cause
"/usr/bin/qemu-system-x86_64: double free or corruption (!prev)"

Signed-off-by: Liang Yan <lyan@suse.com>
---
 chardev/baum.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/chardev/baum.c b/chardev/baum.c
index 302dd9666c..67fd783a59 100644
--- a/chardev/baum.c
+++ b/chardev/baum.c
@@ -643,6 +643,7 @@ static void baum_chr_open(Chardev *chr,
         error_setg(errp, "brlapi__openConnection: %s",
                    brlapi_strerror(brlapi_error_location()));
         g_free(handle);
+        baum->brlapi = NULL;
         return;
     }
     baum->deferred_init = 0;
-- 
2.14.1